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Article
Tone Generation by Flow Past Deep Wall Cavities
AIAA 25th Aerospace Sciences Meeting: Reno, Nevada
  • D. D. Erickson, Worcester Polytechnic Institute
  • William W. Durgin, Worcester Polytechnic Institute
Publication Date
1-12-1987
Abstract

Flow past deep wall cavities exhibits strong interaction with the standing wave system in the cavity. The shear layer separating the exterior flow from the cavity flow supports instabilities which excite the normal cavity modes. In turn, the cavity wave system reinforces the instabilities. Experimental studies have shown that two distinct instability modes are encountered as the external velocity is increased. The pressure coefficient versus Strouha1 number behavior reveals two maxima which correspond to different instability modes of the shear layer. Flow visualization studies have shown that these modes correspond to distinct shear 1ayer vortex structures. At high velocities, single large-scale vortices are formed on the interface. At lower velocities, two vortices are present, simultaneously.

Citation Information
D. D. Erickson and William W. Durgin. "Tone Generation by Flow Past Deep Wall Cavities" AIAA 25th Aerospace Sciences Meeting: Reno, Nevada (1987)
Available at: http://works.bepress.com/wdurgin/58/